These 2-1/2 Inch X 14 Inch cloth sanding belts are made with premium German engineered Starcke material. All our sanding belts are made custom to order in grits 24 - 120. This Zirconia abrasive grain features Poly Cotton "X" weight backing. These sanding belts feature a butt joint for a consistent and smooth finish and extended sanding belt life. A full resin bond allows for long lasting performance. This high performance abrasive is excellent for carbon steel and hardwood. Zirconia is also great for tough grinding applications.